InsertQuery   (children 3)
 Identifier merge
 ExpressionList (children 1)
  Identifier x
 SelectWithUnionQuery (children 1)
  ExpressionList (children 1)
   SelectQuery (children 3)
    ExpressionList (children 1)
     Function plus (alias x) (children 1)
      ExpressionList (children 2)
       Identifier number
       Literal UInt64_100
    TablesInSelectQuery (children 1)
     TablesInSelectQueryElement (children 1)
      TableExpression (children 1)
       TableIdentifier system.numbers
    Literal UInt64_10